Republic Airways Systems- Elecrical
UPDATED ACTUAL Exam Questions and
CORRECT Answers
The sources of AC power include: - CORRECT ANSWER - -Two Integrated Drive
Generators (IDGs)
-An APU driven generator
-A Ram Air Turbine (RAT) and
- An external AC Ground Power Unit (AC GPU)
True or false, once mechanically disconnected, an IDG cannot be reconnected in flight. -
CORRECT ANSWER - True
Can the APU generator power the entire electrical system by itself? - CORRECT ANSWER -
Yes, it can
True or false, in the event of a loss of AC power, the Ram Air Turbine RAT must be manually
deployed using the Rat Manual Deploy handle? - CORRECT ANSWER - False
What provides DC power under normal operating conditions? - CORRECT ANSWER -3
Transformer Rectifier Units
&
2 batteries
On battery power only, how long will batteries supply essential loads? - CORRECT
ANSWER - 10 mins
Under what circumstances would we use a DC GPU? - CORRECT ANSWER - For APU start
if battery 2 is unavailable
, System logic provides electrical power for the aircraft according to the following source priority:
- CORRECT ANSWER - R- Respective IDG.... onside
A- APU generator... inside
G- GPU.... outside
O- Opposite IDG.... Cross-side
How many networks make up the electrical system and why? - CORRECT ANSWER -2
independent networks for segregation and fault isolation
Which AC source has priority, the APU or GPU? - CORRECT ANSWER - APU has priority
and will automatically switch when the APU is up and running
You receive the aircraft at the gate, and the AC GPU powers it. You start the APU; once it is up
and running, how can you tell that the APU generator has automatically taken over the electrical
load? - CORRECT ANSWER - AVAIL light on the GPU button, and MFD electrical page
shows a green APU icon
During "normal operation", will a failed IDG de-power the respective AC Bus? - CORRECT
ANSWER - No
How many display units -DUs- come to life when you bring the batteries online? Which ones? -
CORRECT ANSWER - Two come to life. They are Display Units 2 and 3
Can one IDG supply the entire electrical system? - CORRECT ANSWER - Yes
What are the two lights next to the IDGs? - CORRECT ANSWER - Tells you which IDG
must be disconnected and it's associated with an EICAS message
When would the amber IDG oil indicator light illuminate? - CORRECT ANSWER - Hot Lop-
high oil temperature, low oil pressure
&
UPDATED ACTUAL Exam Questions and
CORRECT Answers
The sources of AC power include: - CORRECT ANSWER - -Two Integrated Drive
Generators (IDGs)
-An APU driven generator
-A Ram Air Turbine (RAT) and
- An external AC Ground Power Unit (AC GPU)
True or false, once mechanically disconnected, an IDG cannot be reconnected in flight. -
CORRECT ANSWER - True
Can the APU generator power the entire electrical system by itself? - CORRECT ANSWER -
Yes, it can
True or false, in the event of a loss of AC power, the Ram Air Turbine RAT must be manually
deployed using the Rat Manual Deploy handle? - CORRECT ANSWER - False
What provides DC power under normal operating conditions? - CORRECT ANSWER -3
Transformer Rectifier Units
&
2 batteries
On battery power only, how long will batteries supply essential loads? - CORRECT
ANSWER - 10 mins
Under what circumstances would we use a DC GPU? - CORRECT ANSWER - For APU start
if battery 2 is unavailable
, System logic provides electrical power for the aircraft according to the following source priority:
- CORRECT ANSWER - R- Respective IDG.... onside
A- APU generator... inside
G- GPU.... outside
O- Opposite IDG.... Cross-side
How many networks make up the electrical system and why? - CORRECT ANSWER -2
independent networks for segregation and fault isolation
Which AC source has priority, the APU or GPU? - CORRECT ANSWER - APU has priority
and will automatically switch when the APU is up and running
You receive the aircraft at the gate, and the AC GPU powers it. You start the APU; once it is up
and running, how can you tell that the APU generator has automatically taken over the electrical
load? - CORRECT ANSWER - AVAIL light on the GPU button, and MFD electrical page
shows a green APU icon
During "normal operation", will a failed IDG de-power the respective AC Bus? - CORRECT
ANSWER - No
How many display units -DUs- come to life when you bring the batteries online? Which ones? -
CORRECT ANSWER - Two come to life. They are Display Units 2 and 3
Can one IDG supply the entire electrical system? - CORRECT ANSWER - Yes
What are the two lights next to the IDGs? - CORRECT ANSWER - Tells you which IDG
must be disconnected and it's associated with an EICAS message
When would the amber IDG oil indicator light illuminate? - CORRECT ANSWER - Hot Lop-
high oil temperature, low oil pressure
&
